A lone protester from a group campaigning for the rights of divorced fathers climbed onto the roof of Britain’s Houses of Parliament on Tuesday and unfurled a flag while police officers watched.

The protest group, Fathers 4 Justice, has staged several stunts in the past including scaling the walls of Buckingham Palace and pelting Prime Minister Tony Blair with colored flour while he was addressing parliament.

Police had no immediate comment to make and parliament was not in session at the time.

Fathers 4 Justice said the protester was a man called Guy Harrison -- one of those who threw dyed flour at Blair -- and that the banner he unfurled read: “Does Blair Care?”

A spokesman for the group said Harrison broke away from a public tour of parliament, climbed through a window, up a ladder and onto the roof. “It was really simple stuff,” he said.